Pneumatic tire.



J. P. GASTBRAN.

PNEUMATIC TIRE. APPLICATION FILED SEPT. 26, 1912.

1,059,344. Patented Apr. 22, 1913.

w/r/vsss INVENTOR 7z 7 4 7m W l I BY ATTORNEY ran STAT. s PATENT clarion.

JEAN. FREDERIC GASTERAN, 0F ST..GEORG?ES LES IBAINS, CHARMEEt, FRANCE.

PNEUMATIC Erma.

Specification of Letters I'a'tent.

Patented Apr. 22, 1913.

Application filed September 5236, 1912. Serial No. 722,475.

To all whom it may concern Be it known that I, JEAN Fniinlinio CAs- 'rfiiRAN, a. citizen of the Republic of France, residing at St. Georges les Bains,Charmes, Ardche, France, have invented certainnew and useful Improvements in Pnuematic Tires, of which the following is a specification.

This invention relates to improvements in:

,2 is the inner tube. It will be seen that the inner tube has its lateral walls depressed inwardly at 3 and 4 so that it forms, so to speak, two annular chambers connected by a portion of relatively narrow cross-section, which shape I refer to hereinafter as a substantially 8-shape formation. Above the outer periphery of the inner tube 2 I rovide a protecting member or sheath 5,w lch is preferably made up of a number of leather sheets 6 superposed asshown, and which constitutes an eflicient protecting means strong enough to prevent the penetration of any articles such as nails or the like into the inner tube 2. At the same time this protector will not interfere with the resilient action of the pneumatic tire, not only owing to its inherent flexibility, but also owing to the manner in which it is arranged in relation to the other parts of the tire. I preferably form this protector with its end portions somewhat wider than its central portion, as I find that this increases its flexibility. In order to reduce friction whichmay be caused under stresses set up in running, I ma incase said protector 5 in filling materlal. or padding 7, such as cotton waste or any other suitable material, and this padding'assists in protecting the tire against puncture by acting as an additional peripheral protecting means. In this Way I protect the outer periphery of the inner tube against puncture without in any way interfering with the resilient properties of the tire.

The outer cover is preferably designed to maintain the shape of the inner tube, and to protect it from puncture by-nails or the non-puncturable without losing,

like entering the tire sidewisc. In the em bodiment shown in the drawingl provide the inner face of the outer cover with projections 8 made of rubber or any other suit able material, although I prefer to make these projections of rubber so that they may add to the resiliency of the tire as a Whole. While these projections are herein described and illustrated as forming part of the inner surface of the outer cover, yet it, will. be'understood that they might be made separate if desired.

In the preferred form of outer cover shown in the drawing the usual strips 9 of canvas or like material. are cemented to the tread 10 in the usual manner, and the projections 8 are vulcanized or otherwise connected to the innermost canvas strip 9. An additional strip 11 of canvas or thelike is assed around the outer face of said pro-.

ections 8 and connected thereto, and this strip 11 is also connected with the innermost canvas stri 9 along the curved peripheral face of sai strip as shown. Strips or layers 12 of cotton waste or other suitable padding material are interposed between. the inner tube 3 and the projections 8 at the lower ends of said projections in order to re duce friction between these parts during.

running.

I find it desirable to reinforcethe outer cover at its lower ends and I may do this in any suitable manner, but referably by inter-posing one or more additional strips of canvas or the like, such as the strip 13,

this strip being interposed between the strip 11 and the innermost strip 9. This reinforcement will be found sufficient in practice 'to counteract an strains which may possibly be set up at t ese points.

In operation the projections 8 maintain the special shape of the inner tube and also serve as meansfor protecting the tire against puncture byobjects entering the tire laterally. It will be noted that, owing to the formation of the inner surfaces of the projections 8, no damaging stresses are brought to bear upon the inner tube, so that there is no danger of said projections cutting into or injuriously rubbing against the inner tube. Furthermore it will be noted that the ends of the leather protector 5 are located in such position that they do not diginto the inner tube, but will bear against the rojections 8 through the "interposed pad ing material. They also serve as supports for manifestly impossible with an ordinary pneumatic tire, which would be cut to ieces that my invention isby no means limited copies of this patent may be obtained tor five cents each, by addressing the Commissioner of Patents.

the protecting means and prevent these "tion not only without any damageto the the, but also without transmitting the road means from cutting through the tire. Owing to the special formation of the tire as here in described .and shown in the drawing, I have found, fromactual experience, that should the inner tube be deflated for any reason, as b leakage through the valve, or in the high y improbable event of alpuncture, the tire can run as a resilient shock absorber without in any way injurin the -Thus if the thecar can run his machine to its destinavibration to the vehicle. This would bewere'the automobile to be run with t e inner tube in deflated condition.

While I have described my invention hereinwith reference to a preferred embodiment thereof, I wish it to be clearly understood to the construction herein described and shown, as numerous changesin the form and construction of the tire will be apparent to those skilled in-the art and can be made without departing from the scope of my invention, as pointed out in; the c aims which follow, and I also wish it to be understood that I intend these claims to be construed as generic in the widest sense.

Having now described my invention, what Iclaim 1s:

1. An outer cover for a pneumatic tire 'silient members -formin comprising internal llaterally disposed reinwardly arched surfaces, and an outwar ly arched rotecting device bearin against and bridging said laterally, dispose members.

2.An'outer cover for a pneumatic t1re comprising an arched protecting member concentric with the tire and having its ends curved substantially toward the base of the cover, and lateral abutments disposed on eachside of the outer cover adapted to depress the lateral wallsof an innertube, said protecting member bearing against said abutments.

' 3. An outer cover for a pneumatic tire comprising lateral resilient abut-merits defining a portion of a chamber of substantially 8-shape cross sectional formation, and

a protecting member whose sides bear sub stantially-v erpendicularly against said abutments" efininjg the remaining portion of said chamber.

. 4, Apneumatic tire of the kind described, comprising an outer cover, laterally disposed members associated with saidouter cover for depressing the inner tube to cause said inner tube to assume a substantially 8- shape cross-sectional. formation, and protecting means, resting upon and bearing against said laterally dis osed members.

' In testimon w ereof I aflix my signature in presence 0 two witnesses.

JEAN FREDERIC CASTERAN.

Witnesses:

E. T. MADDEN, W. H. Cam).

Washington, D. 40." 

